[PATCH 1/2] drm/edid: Parse HDMI 2.2 FRL rates from the SCDS

[Fangzhi Zuo <jerry.zuo@amd.com>]

[Why]
drm_get_max_frl_rate() only decodes Max_FRL_Rate values 1-6, so a sink
advertising an HDMI 2.2 rate (7, 8 or 9) falls into the default case and
is reported as having no FRL support at all.

[How]
Decode the HDMI 2.2 Max_FRL_Rate values 7, 8 and 9 as 16, 20 and 24 Gbps
per lane over 4 lanes.

Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
---
 drivers/gpu/drm/drm_edid.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 42f4e41c459f..48d5c4bd4812 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -6193,6 +6193,18 @@ void drm_get_max_frl_rate(int max_frl_rate, u8 *max_lanes, u8 *max_rate_per_lane
 		*max_lanes = 4;
 		*max_rate_per_lane = 12;
 		break;
+	case 7:
+		*max_lanes = 4;
+		*max_rate_per_lane = 16;
+		break;
+	case 8:
+		*max_lanes = 4;
+		*max_rate_per_lane = 20;
+		break;
+	case 9:
+		*max_lanes = 4;
+		*max_rate_per_lane = 24;
+		break;
 	case 0:
 	default:
 		*max_lanes = 0;
-- 
2.53.0